Wall chute



Patented Oct. 21, 1924.

ICE.

WALTER HERBERT PRATT, OF MILWAUKEE, WISCONSIN.

WALL CHUTE.

Application filed June 10, 1922. Serial No. 567,381.

To all whom it may concern;

Be it known that I, WALTER HERBERT PRATT, a citizen of the UnitedStates, and a resident of Milwaukee, in the county of Milwaukee andState of lVisconsin, have invented certain new and useful Improvementsin Wall Chutes, of which the following is a specification.

My invention relates to wall chutes and the principal object of myinvention is to provide an inexpensive chute adapted to be placed in thewall of an already constructed house to permit material and newspapersto be delivered into the house while preventing the entrance of coldair. In the drawings accompanying this specification and forming a partthereof I have shown, for purposes of illustration, one form which myinvention may assume. In these drawings:

Figure 1 is a longitudinal sectional view of this illustrativeembodiment, while Figure 2 is an elevation of the outside front.

' The chute herein illustrated comprises an outer section A and an innersection B. The outer section A comprises a face plate 11 provided with aflange 12 adapted to overlie the outer face of a Wall and an opening 13adapted to receive the material to be delivered into the house and to beclosed by an inwardly swinging door 14 pivoted at 15 to the side wallsof a tube 16 which is of a rectangular crosssection slightly greaterthan the area of the door 14 and is formed integral with the face plate11 as shown. The section B comprises a face plate 21 similar tothe faceplate 11 and provided with a flange 22 adapted to overlie the inner faceof the wall and an opening 23 through which the material insertedthrough the opening 13 may pass into the house. This opening 23 isadapted to be closed by a door 24: pivoted at 25 to the side Walls of atube 26 which is of a rectangular cross-section substantially the sameas the area of the door 2% and slightly greater than that of the tube 16of the part A so that the tube 26 is adapted to telescope over the tube16 to make a tight fit therewith while permitting extension andcontraction of the distance between the face plates 11 and 21 to thuspermit the chute to be fitted to walls of different thickness. Forconvenience and to avoid projections on which the matter, passingthrough the chute might catch the ends of the tubes 16 and 26 arebeveled as shown at 17 and 27. The doors 14; and 24 may be held inclosed position by suitable springs (not shown) and the spring actuatedmovement of these doors 14 and 24 may be limited by a beading 18extending around the opening 13 of the face plate 11 and by a beading 28extending around the door 24 except at the top where it"is integral withthe face plate 11.

It will be understood from the above description that I have provided achute which may be inserted in an already built house without difficultyor the necessitv of employing skilled labor or appreciably altering thehouse and that this chute while excluding cold air from the outside willnevertheless permit the insertion into the house of mail,

newspapers, and such matter. I am aware a that chutes have heretoforebeen provided for various purposes but upon examinin such of these ashave been patented an others of which I have become aware I am not ableto find one that is entirely satisfactory for the purpose or possessesthe advantages possessed by the chute herein decribed. I appreciate thatthe chutes heretofore disclosed are not part of my invention and I donot claim them as sucha What I do claim as my invention is:

A wall chute comprising an outer tube adapted to extend inwardly fromthe exterior face of a wall, an inner tube adapted to extend outwardlyfrom the interior face of a wall and to telescopically surround at leastthe end of said outer tube, a flange carried by said outer tube at theouter end thereof in a plane sub stantially perpendicular to the axis ofsaidtube adapted to overlie the exterior face of said wall adjacent saidtube, a door carried by said outer tube at the outer end thereof adaptedto normally close said tube but pivoted to swing into said tube into aposition tube at the inner end thereof adapted to parallel to a Wall ofsaid tube, a flange earnormally close said tube but pivoted to ried bysaid inner tube at the inner end swing from said tube into apositionparallel 10 thereof in a plane substantially perpendicuto a Wall of saidtube.

lar to the axis of said tube adapted to over- In testimony whereof Ihave signed my lie the interior face of said Wall adjacent name to theabove specification.

said tube, and a door carried by said inner WALTER HERBERT PRATT.

